In the following we calculate by a different method the contributions to the memory term, cf. [1]},
probably using different Feynman rules. The \(D\)  dimensional tensor integrals are decomposed using the
Passarino–Veltman representation [2]} and the momentum integrals are performed using
hypergeometric techniques [3]}, [4]} after a Feynman parameterization.
In the final result the \(\varepsilon \) 
dependence
cancels, as the case of \(H_{\rm ang.}\) , leaving the integrals over the energy components.
